Home / 1,509.20-2,081.61-1,299.01

Finding the Fourth Proportional to 1,509.20, 2,081.61 and 1,299.01

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Solution

The fourth proportional to 1,509.20, 2,081.61 and 1,299.01 is: 1,791.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,509.20 : 2,081.61 = 1,299.01 : x
  2. Step 2: Convert to fraction form
    1,509.20/2,081.61 = 1,299.01/x
  3. Step 3: Cross multiply
    1,509.20x = 2,081.61 × 1,299.01
  4. Step 4: Simplify right side
    1,509.20x = 2,704,032.21
  5. Step 5: Solve for x
    x = 2,704,032.21/1,509.20
  6. Step 6: Final answer
    x = 1,791.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.